git/git-repack.sh
Linus Torvalds ef07618fdd git-repack: Properly abort in corrupt repository
In a corrupt repository, git-repack produces a pack that does not
contain needed objects without complaining, and the result of this
combined with -d flag can be very painful -- e.g. a lossage of one
tree object can lead to lossage of blobs reachable only through that
tree.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-11-21 14:08:49 -08:00

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#!/bin/sh
#
# Copyright (c) 2005 Linus Torvalds
#
. git-sh-setup || die "Not a git archive"
no_update_info= all_into_one= remove_redundant= local=
while case "$#" in 0) break ;; esac
do
case "$1" in
-n) no_update_info=t ;;
-a) all_into_one=t ;;
-d) remove_redundant=t ;;
-l) local=t ;;
*) break ;;
esac
shift
done
rm -f .tmp-pack-*
PACKDIR="$GIT_OBJECT_DIRECTORY/pack"
# There will be more repacking strategies to come...
case ",$all_into_one," in
,,)
rev_list='--unpacked'
rev_parse='--all'
pack_objects='--incremental'
;;
,t,)
rev_list=
rev_parse='--all'
pack_objects=
# Redundancy check in all-into-one case is trivial.
existing=`cd "$PACKDIR" && \
find . -type f \( -name '*.pack' -o -name '*.idx' \) -print`
;;
esac
if [ "$local" ]; then
pack_objects="$pack_objects --local"
fi
name=$(git-rev-list --objects $rev_list $(git-rev-parse $rev_parse) 2>&1 |
git-pack-objects --non-empty $pack_objects .tmp-pack) ||
exit 1
if [ -z "$name" ]; then
echo Nothing new to pack.
exit 0
fi
echo "Pack pack-$name created."
mkdir -p "$PACKDIR" || exit
mv .tmp-pack-$name.pack "$PACKDIR/pack-$name.pack" &&
mv .tmp-pack-$name.idx "$PACKDIR/pack-$name.idx" ||
exit
if test "$remove_redundant" = t
then
# We know $existing are all redundant only when
# all-into-one is used.
if test "$all_into_one" != '' && test "$existing" != ''
then
sync
( cd "$PACKDIR" &&
for e in $existing
do
case "$e" in
./pack-$name.pack | ./pack-$name.idx) ;;
*) rm -f $e ;;
esac
done
)
fi
fi
case "$no_update_info" in
t) : ;;
*) git-update-server-info ;;
esac